Re: Latest M40A5 configuration
Sorry its taken so long to reply, I was not there when they were doing all the testing of the different barrel lengths but from what I was told they basically took a barrel (can't remember the initial length) and tested the accuracy, took a 1/2 inch off tested again, took a 1/2 inch off tested again, etc, etc. until they found which length had the best grouping and went with that.
I am not sure what kind of handling the users had with the weapon. And we measure end to end.